CN106876433A - Organic electroluminescence assembly, display panel, display device and lighting device - Google Patents

Organic electroluminescence assembly, display panel, display device and lighting device Download PDF

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Publication number
CN106876433A
CN106876433A CN201710119770.1A CN201710119770A CN106876433A CN 106876433 A CN106876433 A CN 106876433A CN 201710119770 A CN201710119770 A CN 201710119770A CN 106876433 A CN106876433 A CN 106876433A
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quantum dot
organic electroluminescence
green glow
light
converter section
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孙艳六
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BOE Technology Group Co Ltd
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BOE Technology Group Co Ltd
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Priority to CN201710119770.1A priority Critical patent/CN106876433A/en
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    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/30Devices specially adapted for multicolour light emission
    • H10K59/35Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00Organic light-emitting devices
    • H10K50/10OLEDs or polymer light-emitting diodes [PLED]
    • H10K50/11OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00Organic light-emitting devices
    • H10K50/10OLEDs or polymer light-emitting diodes [PLED]
    • H10K50/11OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
    • H10K50/125OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers specially adapted for multicolour light emission, e.g. for emitting white light
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10OLED displays
    • H10K59/12Active-matrix OLED [AMOLED] displays
    • H10K59/1201Manufacture or treatment
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K2101/00Properties of the organic materials covered by group H10K85/00
    • H10K2101/10Triplet emission
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K2102/00Constructional details relating to the organic devices covered by this subclass
    • H10K2102/301Details of OLEDs

Abstract

The invention discloses a kind of organic electroluminescence assembly, including:Luminescent layer and light conversion layer, the light conversion layer include transmittance section, the first converter section and the second converter section, and the light conversion layer is arranged on the light direction of the luminescent layer;The luminescent layer stimulated emission green glow;The green light transmission is gone out in the transmittance section, and first converter section absorbs the green glow and launches blue light, and second converter section absorbs the green glow and launches feux rouges.Present invention also offers a kind of display panel, display device and lighting device.Organic electroluminescence assembly proposed by the present invention, display panel, display device and lighting device, can solve the problem that the low problem of EL luminous efficiencies.

Description

Organic electroluminescence assembly, display panel, display device and lighting device
Technical field
The present invention relates to display technology field, a kind of organic electroluminescence assembly, display panel, display device are particularly related to And lighting device.
Background technology
Organic EL (electroluminescence, electroluminescent), also referred to as OLED, represent organic EL components or Organic el display (or OLED display).OLED display is more and more concerned due to its excellent display performance, and It is widely regarded as follow-on main flow display.
However, realize it is of the invention during, inventor has found, it is difficult that existing OLED display has some technologies Topic:Luminous efficiency such as G light EL (organic electroluminescence device of green light) is higher, and B light EL (the organic electroluminescence hairs of blue light-emitting Optical device) luminous efficiency it is relatively low;So, an overall hair for pixel (including tri- luminescent devices of color of RGB) Light efficiency will be influenceed by low luminous efficiency EL, so as to influence the luminous efficiency of whole OLED display.In order to overcome this The problem of kind, microcavity is employed in the prior art, and (in microcavity, the light for meeting the wavelength of condition of resonance is interfered and is obtained due to mutually rising Strengthen) modulation technique modulated to the light that EL sends;However, after by using microcavity modulation EL, luminous efficiency and colour purity Degree can there are problems that mutually again.
The content of the invention
In view of this, it is an object of the invention to propose a kind of organic electroluminescence assembly, display panel, display device and Lighting device, can solve the problem that the low problem of EL luminous efficiencies.
Based on the organic electroluminescence assembly that the above-mentioned purpose present invention is provided, including:Luminescent layer and light conversion layer, the light Conversion layer includes transmittance section, the first converter section and the second converter section, and the light conversion layer is arranged on the light extraction of the luminescent layer On direction;
The luminescent layer stimulated emission green glow;
The green light transmission is gone out in the transmittance section, and first converter section absorbs the green glow and launches blue light, institute The second converter section is stated to absorb the green glow and launch feux rouges.
Optionally, first converter section is made up of the first quantum dot, and/or, second converter section is by the second quantum Point is constituted;
Particle diameter of the particle diameter of first quantum dot less than second quantum dot.
Optionally, the particle diameter range of first quantum dot is 2~4nm, and/or, second quantum dot Grain diameter range is 6~8nm.
Optionally, the particle diameter of first quantum dot is 3nm, and/or, the particle diameter model of second quantum dot It is 7nm to enclose.
Optionally, the making material of first quantum dot and/or second quantum dot include IV types, III-V types or The semi-conducting material of II-VI types.
Optionally, the making material of first quantum dot and/or second quantum dot includes CdTe or CdSe.
Optionally, the transmittance section be green color filter or high transmittance material, or, be not filled with the transmittance section appoint What material.
Optionally, it is provided with diffusion layer between the luminescent layer and light conversion layer.
A kind of second aspect of the embodiment of the present invention, there is provided display panel, including having as described in any of the above Organic electro luminescent component.
3rd aspect of the embodiment of the present invention, there is provided a kind of display device, including foregoing display panel.
A kind of 4th aspect of the embodiment of the present invention, there is provided lighting device, including having as described in any of the above Organic electro luminescent component.
From the above it can be seen that the organic electroluminescence assembly provided in an embodiment of the present invention, display panel, aobvious Showing device and lighting device, by by the luminescent layer of organic electroluminescence assembly all using the electroluminescent of stimulated emission green glow Material, then sets light conversion layer on the light direction of luminescent layer, wherein, green glow is converted into blue light by the first converter section, thoroughly Light portion transmits green glow, and green glow is converted into feux rouges by the second converter section, so as to form the colors of RGB tri- of mixing;So, by using receiving Excite the high-luminous-efficiency of the electroluminescent material for penetrating green glow so that the overall luminous efficiency of organic electroluminescence assembly is carried Rise, and cause that the whole lighting efficiency of display panel, display device and lighting device is lifted.
Brief description of the drawings
The structural representation of the one embodiment for the organic electroluminescence assembly that Fig. 1 is provided for the present invention;
Second structural representation of embodiment of the organic electroluminescence assembly that Fig. 2 is provided for the present invention;
3rd structural representation of embodiment of the organic electroluminescence assembly that Fig. 3 is provided for the present invention;
4th structural representation of embodiment of the organic electroluminescence assembly that Fig. 4 is provided for the present invention;
5th structural representation of embodiment of the organic electroluminescence assembly that Fig. 5 is provided for the present invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention become more apparent, below in conjunction with specific embodiment, and reference Accompanying drawing, the present invention is described in more detail.
It should be noted that the statement of all uses " first " and " second " is for differentiation two in the embodiment of the present invention The entity of individual same names non-equal or the parameter of non-equal, it is seen that " first " " second " should not only for the convenience of statement The restriction to the embodiment of the present invention is interpreted as, subsequent embodiment is no longer illustrated one by one to this.
Based on object defined above, the one side of the embodiment of the present invention, there is provided one kind can solve the problem that EL luminous efficiencies are low Problem organic electroluminescence assembly.As shown in figure 1, being first implementation of the organic electroluminescence assembly for providing of the invention The structural representation of example.
The organic electroluminescence assembly, including:Luminescent layer 10 and light conversion layer 20, the light conversion layer 20 include printing opacity Portion 21, the first converter section 22 and the second converter section 23, and the light conversion layer 20 is arranged on the light direction of the luminescent layer 10 On;
The stimulated emission green glow of the luminescent layer 10;
The green light transmission is gone out in the transmittance section 21, and first converter section 22 absorbs the green glow and launches indigo plant Light, second converter section 23 absorbs the green glow and launches feux rouges;Optionally, the transmittance section 21 uses and is transmissive to light Any materials, first converter section 22 and second converter section 23 are using light conversion ratio material higher.
From above-described embodiment as can be seen that the organic electroluminescence assembly provided in an embodiment of the present invention, by will hair Photosphere all using the electroluminescent material of stimulated emission green glow, then sets light conversion layer on the light direction of luminescent layer, Wherein, green glow is converted into blue light by the first converter section, and green glow is converted into feux rouges by transmittance section transmission green glow, the second converter section, from And form the colors of RGB tri- of mixing;So, by using stimulated emission green glow electroluminescent material high-luminous-efficiency so that The overall luminous efficiency of organic electroluminescence assembly is lifted.
Optionally, the luminescent layer 10 can be using the arbitrary material for launching green glow through electroexcitation;Preferably, described Luminescent layer 10 can obtain whole lighting efficiency higher from the EL of luminous efficiency (for example, luminous efficiency > 80cd/A) higher Organic electroluminescence assembly.Preferably, the luminescent layer 10 is the EL of luminous efficiency >=120cd/A, and what is so obtained is organic The whole lighting efficiency of electroluminescence part is higher.
Optionally, the transmittance section 21 be green color filter or high transmittance material, or, do not filled out at the transmittance section 21 Fill any material;Wherein, the transmittance section 21 uses green color filter, can filter out other light beyond green glow, so that To purer green glow;The transmittance section 21 uses high transmittance material, can reduce the transmission loss of green glow;The transmittance section 21 position is not filled with any material (referring to the drawings 1), and the light launched can be made not suffer a loss.As can be seen here, based on difference Demand, the any-mode of foregoing transmittance section 21 can be selected to implement.
Optionally, first converter section 22 use can absorb green glow and launch blue light and conversion ratio appointing more than 5% Meaning material, second converter section 23 use can absorb green glow and launch feux rouges and any materials of the conversion ratio more than 40%; In such manner, it is possible to obtain the relatively good organic electroluminescence assembly of whole lighting efficiency.
Preferably, first converter section 22 use can absorb green glow and launch blue light and conversion ratio appointing more than 10% Meaning material, second converter section 23 use can absorb green glow and launch feux rouges and any materials of the conversion ratio more than 45%; In such manner, it is possible to obtain whole lighting efficiency organic electroluminescence assembly higher.
Preferably, first converter section 22 use can absorb green glow and launch blue light and conversion ratio appointing more than 30% Meaning material, second converter section 23 use can absorb green glow and launch feux rouges and any materials of the conversion ratio more than 55%, The whole lighting efficiency of the organic electroluminescence assembly for so obtaining is higher.
Present invention also offers the second of a kind of organic electroluminescence assembly of the problem that can solve the problem that EL luminous efficiencies are low Individual embodiment.As shown in Fig. 2 being second structural representation of embodiment of the organic electroluminescence assembly.
The organic electroluminescence assembly, including:Luminescent layer 10 and light conversion layer 20, the light conversion layer 20 include printing opacity Portion 21, the first converter section 22 and the second converter section 23, and the light conversion layer 20 is arranged on the light direction of the luminescent layer 10 On;Wherein, the transmittance section 21 is made using high transmittance material (for example, light transmittance >=80%), first converter section 22 It is made up of the first quantum dot 221, second converter section 23 is made up of the second quantum dot 231, and first quantum dot 221 Particle diameter of the particle diameter less than second quantum dot 231;
The stimulated emission green glow of the luminescent layer 10;
The green light transmission is gone out in the transmittance section 21, and first converter section 22 absorbs the green glow and launches indigo plant Light, second converter section 23 absorbs the green glow and launches feux rouges.
From above-described embodiment as can be seen that the organic electroluminescence assembly provided in an embodiment of the present invention, by will hair Photosphere all using the electroluminescent material of stimulated emission green glow, then sets light conversion layer on the light direction of luminescent layer, Wherein, green glow is converted into blue light by the first converter section, and green glow is converted into feux rouges by transmittance section transmission green glow, the second converter section, from And form the colors of RGB tri- of mixing;So, by using stimulated emission green glow electroluminescent material high-luminous-efficiency so that The overall luminous efficiency of organic electroluminescence assembly is lifted;Also, due to the conversion efficiency of quantum dot (usual feelings higher Under condition, theoretical conversion efficiency>60%), when the luminous efficiency of green glow EL is 120cd/A, changed by quantum dot, blue light and red The luminous efficiency of light is all far longer than current 4cd/A and 50cd/A, so as to improve luminous efficiency.Meanwhile, using little particle The first converter section for making of the first quantum dot absorb and green glow and launch blue light, the made using the second quantum dot of bulky grain Two converter sections absorb green glow and launch feux rouges, because the emission spectrum of quantum dot is universal narrower, therefore, also improve on the whole The excitation of organic electro luminescent component.
Optionally, the particle diameter range of first quantum dot 221 is 2~4nm, and/or, second quantum dot 231 particle diameter range is 6~8nm.The first quantum dot and the second quantum dot energy in aforementioned definition particle diameter range It is enough that green glow is converted into more satisfactory blue light and feux rouges respectively.
Optionally, the particle diameter of first quantum dot 221 is 3nm or so, and/or, second quantum dot 231 Particle diameter range is 7nm or so.The first quantum dot and the second quantum dot in aforementioned definition particle diameter can be preferably Green glow is converted into more satisfactory blue light and feux rouges.
Optionally, the making material of first quantum dot 221 and/or second quantum dot 231 includes IV types, III- The semi-conducting material of V-type or II-VI types.Here, the semi-conducting material of IV types, III-V types or II-VI types makes as quantum dot Material can preferably complete light conversion.
Optionally, the making material of first quantum dot 221 and/or second quantum dot 231 include CdTe or CdSe.Here, CdTe or CdSe can preferably complete light conversion as quantum dot making material.
Present invention also offers the 3rd of a kind of organic electroluminescence assembly of the problem that can solve the problem that EL luminous efficiencies are low the Individual embodiment.As shown in figure 3, being the 3rd structural representation of embodiment of the organic electroluminescence assembly.
The organic electroluminescence assembly, including:Luminescent layer 10, light conversion layer 20 and diffusion layer 30, the luminescent layer 10 The diffusion layer 30 is set and light conversion layer 20 between;The light conversion layer 20 includes transmittance section 21, the first converter section 22 and the Two converter sections 23, and the light conversion layer 20 is arranged on the light direction side of the luminescent layer 10;Wherein, the transmittance section 21 Using green color filter, first converter section 22 is made up of the first quantum dot 221, and second converter section 23 is by the second quantum Point 231 constitute, and first quantum dot 221 particle diameter less than second quantum dot 231 particle diameter;
The stimulated emission green glow of the luminescent layer 10;The diffusion layer 30 uniformly spreads the green glow that luminescent layer 10 is launched, The light conversion layer 20 is set more uniformly to receive the green glow;
The transmittance section 21 is filtered the light of other colors and the green light transmission is gone out, and first converter section 22 absorbs The green glow simultaneously launches blue light, and second converter section 23 absorbs the green glow and launches feux rouges.
From above-described embodiment as can be seen that the organic electroluminescence assembly provided in an embodiment of the present invention, by will hair Photosphere all using the electroluminescent material of stimulated emission green glow, then sets light conversion layer on the light direction of luminescent layer, Wherein, green glow is converted into blue light by the first converter section, and transmittance section is filtered the light of other colors and transmits more pure green glow, the Green glow is converted into feux rouges by two converter sections, so as to form the colors of RGB tri- of mixing;So, by using the electricity of stimulated emission green glow The high-luminous-efficiency of electroluminescent material so that the overall luminous efficiency of organic electroluminescence assembly is lifted;Also, due to amount Conversion efficiency (under normal circumstances, the theoretical conversion efficiency higher of son point>60%), the luminous efficiency in green glow EL is 120cd/ During A, changed by quantum dot, the luminous efficiency of blue light and feux rouges is all far longer than current 4cd/A and 50cd/A, so as to improve Luminous efficiency.Meanwhile, the first converter section made using short grained first quantum dot is absorbed green glow and launches blue light, is used The second converter section that second quantum dot of bulky grain makes absorbs green glow and launches feux rouges, because the emission spectrum of quantum dot is universal It is narrower, therefore, the excitation of organic electroluminescence assembly is also improved on the whole.
Optionally, the particle diameter range of first quantum dot 221 is 2~4nm, and/or, second quantum dot 231 particle diameter range is 6~8nm.The first quantum dot and the second quantum dot energy in aforementioned definition particle diameter range It is enough that green glow is converted into more satisfactory blue light and feux rouges respectively.
Optionally, the particle diameter of first quantum dot 221 is 3nm or so, and/or, second quantum dot 231 Particle diameter range is 7nm or so.The first quantum dot and the second quantum dot in aforementioned definition particle diameter can be preferably Green glow is converted into more satisfactory blue light and feux rouges.
Optionally, the making material of first quantum dot 221 and/or second quantum dot 231 includes IV types, III- The semi-conducting material of V-type or II-VI types.Here, the semi-conducting material of IV types, III-V types or II-VI types makes as quantum dot Material can preferably complete light conversion.
Optionally, the making material of first quantum dot 221 and/or second quantum dot 231 include CdTe or CdSe.Here, CdTe or CdSe can preferably complete light conversion as quantum dot making material.
Present invention also offers the 4th of a kind of organic electroluminescence assembly of the problem that can solve the problem that EL luminous efficiencies are low the Individual embodiment.As shown in figure 4, being the 4th structural representation of embodiment of the organic electroluminescence assembly for providing of the invention.
The organic electroluminescence assembly, including:Luminescent layer 10 and light conversion layer 20;The luminescent layer 10 is arranged including array The EL luminescence units of cloth, each EL luminescence unit includes that anode 11, hole injection layer 12, hole transmission layer 13, green glow EL light Material layer 14, electron transfer layer 15, electron injecting layer 16 and negative electrode 17, the EL luminescence units of array arrangement are by the envelope of encapsulating material 30 Dress, the light conversion layer 20 is arranged on the encapsulating material 30;
The light conversion layer 20 includes transmittance section 21, the first converter section 22 and the second converter section 23,21, first turn of transmittance section Change between the converter section 23 of portion 22 and second and interval action is played by encapsulating material 30, to reduce transmittance section 21, the first converter section 22 And second converter section 23 emergent light between issuable mixed light phenomenon;The light conversion layer 20 is arranged on the luminescent layer 10 Light direction side, and transmittance section 21, the first converter section 22 and the second converter section 23 each correspond to corresponding EL and light respectively Unit;Wherein, the transmittance section 21 uses green color filter, first converter section 22 to be made up of the first quantum dot, and described Two converter sections 23 are made up of the second quantum dot, and first quantum dot particle diameter less than second quantum dot particle Diameter;
The stimulated emission green glow of the luminescent layer 10, and encapsulated material 30 is transmitted to transmittance section 21, the and of the first converter section 22 Second converter section 23;
The transmittance section 21 is filtered the light of other colors and the green light transmission is gone out, and first converter section 22 absorbs The green glow simultaneously launches blue light, and second converter section 23 absorbs the green glow and launches feux rouges.
From above-described embodiment as can be seen that the organic electroluminescence assembly provided in an embodiment of the present invention, by will hair Photosphere all using the electroluminescent material of stimulated emission green glow, then sets light conversion layer on the light direction of luminescent layer, Wherein, green glow is converted into blue light by the first converter section, and transmittance section is filtered the light of other colors and transmits more pure green glow, the Green glow is converted into feux rouges by two converter sections, so as to form the colors of RGB tri- of mixing;So, by using the electricity of stimulated emission green glow The high-luminous-efficiency of electroluminescent material so that the overall luminous efficiency of organic electroluminescence assembly is lifted;Also, due to amount The conversion efficiency of son point is higher, when the luminous efficiency of green glow EL is 120cd/A, is changed by quantum dot, blue light and feux rouges Luminous efficiency be all far longer than current 4cd/A and 50cd/A, so as to improve luminous efficiency.Meanwhile, using short grained The first converter section that first quantum dot makes absorbs green glow and launches blue light, second made using the second quantum dot of bulky grain Converter section absorbs green glow and launches feux rouges, because the emission spectrum of quantum dot is universal narrower, therefore, also improve on the whole organic The excitation of electroluminescence part.
It is pointed out that the structure of EL luminescence units described in above-described embodiment employs a kind of luminous lists of common EL The structure type of unit, but do not represent the present embodiment and eliminate the structure type of other EL luminescence units (for example, only transport layer EL luminescence units or implanted layer, etc. only is set in anode-side), other common EL luminescence unit structures all should belong to Protection scope of the present invention.
Optionally, the particle diameter range of first quantum dot is 2~4nm, and/or, second quantum dot Grain diameter range is 6~8nm.The first quantum dot and the second quantum dot in aforementioned definition particle diameter range can respectively by Green glow is converted to more satisfactory blue light and feux rouges.
Optionally, the particle diameter of first quantum dot is 3nm or so, and/or, the particle of second quantum dot is straight Footpath scope is 7nm or so.The first quantum dot and the second quantum dot in aforementioned definition particle diameter can preferably by green glow Be converted to more satisfactory blue light and feux rouges.
Optionally, the making material of first quantum dot and/or second quantum dot include IV types, III-V types or The semi-conducting material of II-VI types.Here, the semi-conducting material of IV types, III-V types or II-VI types is used as quantum dot making material Light conversion can preferably be completed.
Optionally, the making material of first quantum dot and/or second quantum dot includes CdTe or CdSe.This In, CdTe or CdSe can preferably complete light and change as quantum dot making material.
Present invention also offers the 4th of a kind of organic electroluminescence assembly of the problem that can solve the problem that EL luminous efficiencies are low the Individual embodiment.As shown in figure 5, being the 5th structural representation of embodiment of the organic electroluminescence assembly for providing of the invention.
The organic electroluminescence assembly, including:Luminescent layer 10 and light conversion layer 20;The luminescent layer 10 is arranged including array The EL luminescence units of cloth, each EL luminescence unit includes that anode 11, hole injection layer 12, hole transmission layer 13, green glow EL light Material layer 14, electron transfer layer 15, electron injecting layer 16 and negative electrode 17, the EL luminescence units of array arrangement are by the envelope of encapsulating material 30 Dress, the light conversion layer 20 is arranged on the encapsulating material 30;
The light conversion layer 20 includes transmittance section 21, the first converter section 22 and the second converter section 23,21, first turn of transmittance section Change the converter section 23 of portion 22 and second mutually to adjoin, in transmittance section 21, the first converter section 22 and the three of the second converter section 23 two-by-two The side of the close encapsulating material 30 of adjacent seam crossing, sets black matrix 40, to reduce transmittance section 21, the and of the first converter section 22 Issuable mixed light phenomenon between the emergent light of the second converter section 23;The light conversion layer 20 is arranged on the luminescent layer 10 Light direction side, and transmittance section 21, the first converter section 22 and the second converter section 23 each correspond to the luminous lists of corresponding EL respectively Unit;Wherein, the transmittance section 21 uses green color filter, first converter section 22 to be made up of the first quantum dot, and described second Converter section 23 is made up of the second quantum dot, and the particle diameter of first quantum dot is straight less than the particle of second quantum dot Footpath;
The stimulated emission green glow of the luminescent layer 10, and encapsulated material 30 is transmitted to transmittance section 21, the and of the first converter section 22 Second converter section 23;
The transmittance section 21 is filtered the light of other colors and the green light transmission is gone out, and first converter section 22 absorbs The green glow simultaneously launches blue light, and second converter section 23 absorbs the green glow and launches feux rouges.
From above-described embodiment as can be seen that the organic electroluminescence assembly provided in an embodiment of the present invention, by will hair Photosphere all using the electroluminescent material of stimulated emission green glow, then sets light conversion layer on the light direction of luminescent layer, Wherein, green glow is converted into blue light by the first converter section, and transmittance section is filtered the light of other colors and transmits more pure green glow, the Green glow is converted into feux rouges by two converter sections, so as to form the colors of RGB tri- of mixing;So, by using the electricity of stimulated emission green glow The high-luminous-efficiency of electroluminescent material so that the overall luminous efficiency of organic electroluminescence assembly is lifted;Also, due to amount The conversion efficiency of son point is higher, when the luminous efficiency of green glow EL is 120cd/A, is changed by quantum dot, blue light and feux rouges Luminous efficiency be all far longer than current 4cd/A and 50cd/A, so as to improve luminous efficiency.Meanwhile, using short grained The first converter section that first quantum dot makes absorbs green glow and launches blue light, second made using the second quantum dot of bulky grain Converter section absorbs green glow and launches feux rouges, because the emission spectrum of quantum dot is universal narrower, therefore, also improve on the whole organic The excitation of electroluminescence part.
It is pointed out that the structure of EL luminescence units described in above-described embodiment employs a kind of luminous lists of common EL The structure type of unit, but do not represent the present embodiment and eliminate the structure type of other EL luminescence units (for example, only transport layer EL luminescence units or implanted layer, etc. only is set in anode-side), other common EL luminescence unit structures all should belong to Protection scope of the present invention.
Optionally, the particle diameter range of first quantum dot is 2~4nm, and/or, second quantum dot Grain diameter range is 6~8nm.The first quantum dot and the second quantum dot in aforementioned definition particle diameter range can respectively by Green glow is converted to more satisfactory blue light and feux rouges.
Optionally, the particle diameter of first quantum dot is 3nm or so, and/or, the particle of second quantum dot is straight Footpath scope is 7nm or so.The first quantum dot and the second quantum dot in aforementioned definition particle diameter can preferably by green glow Be converted to more satisfactory blue light and feux rouges.
Optionally, the making material of first quantum dot and/or second quantum dot include IV types, III-V types or The semi-conducting material of II-VI types.Here, the semi-conducting material of IV types, III-V types or II-VI types is used as quantum dot making material Light conversion can preferably be completed.
Optionally, the making material of first quantum dot and/or second quantum dot includes CdTe or CdSe.This In, CdTe or CdSe can preferably complete light and change as quantum dot making material.
Additionally, in addition to the light conversion layer set-up mode in each embodiment of above-mentioned organic electroluminescence assembly, can be with Light conversion layer is made into color form membrane and black matrix of arranging in pairs or groups realizes light transformation.The design of this color film, can be with base Selected in prior art, will not be repeated here.
It should be noted that the accompanying drawing of each embodiment of foregoing organic electroluminescence assembly is shown in the form of schematic diagram Go out, these accompanying drawings are illustrated that the schematic structure of organic electroluminescence assembly proposed by the present invention.Those skilled in the art When these accompanying drawings are seen, these organic electroluminescence assemblies manufacture craft in practice can be readily apparent that, and can think To some optional amendment implementation methods.For example, the transmittance section, the first converter section and the second converter section can have from each other There are some gaps formed by manufacture craft.For another example, the luminescent layer can also be such as the structure of light conversion layer similarly, shape As three parts, the transmittance section, the first converter section and the second converter section are corresponded to respectively, so as to the transmittance section, first When adding different voltages on converter section and the corresponding each luminous layer segment of the second converter section, make by the transmittance section, the first conversion The light formed behind portion and the second converter section has the color of different GTGs, so that the different colours for forming a pixel show. Similar technological means conversion, this area conventional technical means that can be grasped according to those skilled in the art is completed, This is repeated no more.
Additionally, containing implementing for its improved structure in the organic electroluminescence assembly provided in the embodiment of the present invention Mode, but those skilled in the art one can readily appreciate that, merely just eliminate necessary for organic electroluminescence assembly Other structures, do not represent the organic electroluminescence assembly provided in the embodiment of the present invention and eliminate setting for these necessary structures Meter.
Based on object defined above, second aspect of the embodiment of the present invention, there is provided one kind can solve the problem that EL luminous efficiencies are low Problem display panel.
The display panel, including such as any embodiment of foregoing organic electroluminescence assembly;Optionally, the Organic Electricity Photoluminescence component as pixel in display panel part, be arranged in array form in the display panel;Or, The luminescent layer of the organic electroluminescence assembly is in the display panel as the part of pixel in display panel Array arrangement form, and the light conversion layer of the organic electroluminescence assembly makes corresponding coloured silk film to complete the conversion of light. Additionally, those skilled in the art are according to the ordinary skill in the art, can deduce, it is necessary that the display panel may also include some Miscellaneous part, such as thin film transistor (TFT) (TFT), storage capacitance (Cst) etc., will not be repeated here.
From above-described embodiment as can be seen that the display panel provided in an embodiment of the present invention, wherein the Organic Electricity for using Photoluminescence component by by luminescent layer all using the electroluminescent material of stimulated emission green glow, then in the light extraction side of luminescent layer Light conversion layer is set up, wherein, green glow is converted into blue light by the first converter section, and transmittance section transmits green glow, and the second converter section will Green glow is converted into feux rouges, so as to form the pixel of the colors of RGB tri- of mixing, and then forms full-color display panel;So, by profit With the high-luminous-efficiency of the electroluminescent material of stimulated emission green glow so that the overall luminous efficiency of display panel is lifted. Additionally, the organic electroluminescence assembly in display panel uses the first converter section that short grained first quantum dot makes by green glow Blue light is converted into, green glow is converted into feux rouges by the second converter section made using the second quantum dot of bulky grain, due to quantum dot Emission spectrum it is universal narrower, therefore, the excitation of organic electroluminescence assembly is also improved on the whole, and then lifted whole aobvious Show the colour gamut of panel.
Based on object defined above, the 3rd aspect of the embodiment of the present invention, there is provided one kind can solve the problem that EL luminous efficiencies are low Problem display device.
The display device, including the display panel in previous embodiment.
Wherein, the display device can be electroluminescent (OLED) display device, for example:Electronic Paper, display, hand Any product or part with display function such as machine, panel computer, television set, notebook computer, DPF, navigator.
From above-described embodiment as can be seen that the display device provided in an embodiment of the present invention, wherein the Organic Electricity for using Photoluminescence component by by luminescent layer all using the electroluminescent material of stimulated emission green glow, then in the light extraction side of luminescent layer Light conversion layer is set up, wherein, green glow is converted into blue light by the first converter section, and transmittance section transmits green glow, and the second converter section will Green glow is converted into feux rouges, so as to form the pixel of the colors of RGB tri- of mixing, and then forms full-color display device;So, by profit With the high-luminous-efficiency of the electroluminescent material of stimulated emission green glow so that the overall luminous efficiency of display device is lifted. Additionally, the organic electroluminescence assembly in display device uses the first converter section that short grained first quantum dot makes by green glow Blue light is converted into, green glow is converted into feux rouges by the second converter section made using the second quantum dot of bulky grain, due to quantum dot Emission spectrum it is universal narrower, therefore, the excitation of organic electroluminescence assembly is also improved on the whole, and then lifted whole aobvious The colour gamut of showing device.
Based on object defined above, the 4th aspect of the embodiment of the present invention, there is provided one kind can solve the problem that EL luminous efficiencies are low Problem lighting device.
The lighting device, including such as any embodiment of foregoing organic electroluminescence assembly;Optionally, the Organic Electricity Photoluminescence component as lighting device part, can be arranged in array form in the lighting device;Or, it is described to have The luminescent layer of organic electro luminescent component as lighting device luminous component, be arranged in array form in the lighting device, And the light conversion layer of the organic electroluminescence assembly makes corresponding coloured silk film to complete the conversion of light.Additionally, this area skill Art personnel can deduce according to the ordinary skill in the art, the lighting device may also include some lighting devices it is necessary other Part, these parts refer to the design of lighting device of the prior art, will not be repeated here.
From above-described embodiment as can be seen that the lighting device provided in an embodiment of the present invention, wherein the Organic Electricity for using Photoluminescence component by by luminescent layer all using the electroluminescent material of stimulated emission green glow, then in the light extraction side of luminescent layer Light conversion layer is set up, wherein, green glow is converted into blue light by the first converter section, and transmittance section transmits green glow, and the second converter section will Green glow is converted into feux rouges, so as to form the colors of RGB tri- of mixing, and then forms the lighting device of adjustable colour light-emitting;So, By using the high-luminous-efficiency of the electroluminescent material of stimulated emission green glow so that the overall luminous efficiency of lighting device is able to Lifting.Additionally, the first converter section that the organic electroluminescence assembly in lighting device is made using short grained first quantum dot Green glow is converted into blue light, green glow is converted into feux rouges by the second converter section made using the second quantum dot of bulky grain, due to The emission spectrum of quantum dot is universal narrower, therefore, the excitation of organic electroluminescence assembly is also improved on the whole, and then is lifted The colour gamut of whole lighting device.
Those of ordinary skill in the art should be understood:Specific embodiment of the invention is the foregoing is only, and It is not used in the limitation present invention, all any modification, modification, equivalent, improvement within the spirit and principles in the present invention, made Deng should be included within the scope of the present invention.

Claims (11)

1. a kind of organic electroluminescence assembly, it is characterised in that including:Luminescent layer and light conversion layer, the light conversion layer include Transmittance section, the first converter section and the second converter section, and the light conversion layer is arranged on the light direction of the luminescent layer;
The luminescent layer stimulated emission green glow;
The green light transmission is gone out in the transmittance section, and first converter section absorbs the green glow and simultaneously launches blue light, and described the Two converter sections absorb the green glow and launch feux rouges.
2. organic electroluminescence assembly according to claim 1, it is characterised in that first converter section is by the first quantum Point is constituted, and/or, second converter section is made up of the second quantum dot;
Particle diameter of the particle diameter of first quantum dot less than second quantum dot.
3. organic electroluminescence assembly according to claim 2, it is characterised in that the particle diameter of first quantum dot Scope is 2~4nm, and/or, the particle diameter range of second quantum dot is 6~8nm.
4. organic electroluminescence assembly according to claim 2, it is characterised in that the particle diameter of first quantum dot It is 3nm, and/or, the particle diameter range of second quantum dot is 7nm.
5. organic electroluminescence assembly according to claim 2, it is characterised in that first quantum dot and/or described The making material of the second quantum dot includes the semi-conducting material of IV types, III-V types or II-VI types.
6. organic electroluminescence assembly according to claim 2, it is characterised in that first quantum dot and/or described The making material of the second quantum dot includes CdTe or CdSe.
7. organic electroluminescence assembly according to claim 1, it is characterised in that the transmittance section be green color filter or High transmittance material, or, it is not filled with any material at the transmittance section.
8. organic electroluminescence assembly according to claim 1, it is characterised in that between the luminescent layer and light conversion layer It is provided with diffusion layer.
9. a kind of display panel, it is characterised in that including the organic electroluminescence assembly as described in claim any one of 1-8.
10. a kind of display device, it is characterised in that including display panel as claimed in claim 9.
11. a kind of lighting devices, it is characterised in that including the organic electroluminescence assembly as described in claim any one of 1-8.
CN201710119770.1A 2017-03-02 2017-03-02 Organic electroluminescence assembly, display panel, display device and lighting device Pending CN106876433A (en)

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Application publication date: 20170620